In 1m length too implantation difficult and lack of fixing strength in 50cm or less.
Easy to implant because the round head, also exited twist in the other iron pile when removing.
In the most easy-to-use length, pull-out strength is also high because the jagged is attached.
Since 10 this has become a box, better to buy at ten units.
It can be sent to the site without going to the hardware store so heavy really grateful.
80 This has been ordered really grateful because I received the next day.